TecNiq, Inc Pair of 4" Round Grommet Mount Truck Trailer RV Reverse Lights, Made in the USA with Bright and durable reverse light, Fits all industry standard 4" applications, Reliable performance over 50,000 hours Lamp is certified for both, one or two backup lamp systems, TecSeal Urethane Potting - Guaranteed Circuit Board Protection Excellent UV Resistance - Automotive exterior lighting grade polycarbonate,IP68 Rated - Dust and water proof with hermetic seal Harsh environment reverse lamp for use on heavy duty trucks, Work vehicles, Trailers, RVs and any motor vehicle requiring a 1X or 2X requirement reverse lamp